2nd Generation Specific 1986-1992 Discussion

Quick Couple Questions

Old 02-17-2005, 02:23 PM
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Hi, I'm very new to the whole rotary thing, I just had a couple quick questions, if someone could help me, that would be fantastic. I was looking around on the forum, and saw S4 and S5 being put around a bit, I was wondering what the difference is. Also, about how long should I let it warm up and cool down when starting it and after driving, non-turbo 88 GXL
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Old 02-17-2005, 02:36 PM
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S4 = 86-88

S5 = 89-91 slightly newer technology, a little more power, but heavier.
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Old 02-17-2005, 02:43 PM
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So do the s5 mods fit onto an s4?
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Old 02-17-2005, 02:46 PM
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Warm up? - When the temp gauge starts to move, you're warmed up.

Cool down is only a factor for aftermarket non-water cooled turbo's.



The only issue is starting it cold & shutting down before it starts to warm up.

There is a flaw in the ECU program that tends to flood the motor the next time you try to start it.
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Old 02-17-2005, 02:49 PM
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oh, ok... thanks so much for taking the time to help a newbie out, I've always loved the way these cars looked, and the fact that it was a rotary, just never really understood the concept, and heard bad stories about letting the warm up, or they'll "f" up
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Old 02-17-2005, 02:53 PM
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Originally Posted by dillyrx7' date='Feb 17 2005, 12:43 PM
So do the s5 mods fit onto an s4?



Most will. Exceptions I can think of:

Fuel injectors - S4= low inpedence, S5= high impedence

The ECU plugs are different, so plug & play fuel controllers have to be adapted.

Body parts are the same.
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Old 02-17-2005, 02:55 PM
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awesome, you're fantastic, thanks again for your help.
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Old 02-17-2005, 03:01 PM
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Originally Posted by dillyrx7' date='Feb 17 2005, 12:49 PM
and heard bad stories about letting the warm up, or they'll "f" up

Just try not to shut it off cold or you may have to go through the "unflood" procedure later.



The RX-7 is a medium high performance design, so it takes medium high maintenance.

3000 mile oil changes are important, and don't let it overheat.
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Old 02-17-2005, 03:07 PM
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When you have any engine that makes more than 2HP per CI, you have to pay attention to the little things.



In case you didn't notice, there is a link, in my sig below, to a complete set of service manuals.
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Old 03-20-2005, 10:59 AM
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Welll.. sort of for the injectors.

86 - 87 1/2 models are low impedence injectors requiring a resistor block to raise the resistance brought to the ECU and 87 1/2 - 88 injectors are high impedence, with the resistance brought directly back to the ECU through the harness.

There's a way to tell the difference between the injectors by color and shape of the connectors, but I forget =P



[quote name='sureshot' date='Feb 17 2005, 12:53 PM']Most will. Exceptions I can think of:

Fuel injectors - S4= low inpedence, S5= high impedence

The ECU plugs are different, so plug & play fuel controllers have to be adapted.

Body parts are the same.

[snapback]673765[/snapback]

[/quote]
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